Accepted May 2024
An ethanol plant
Air terminals on the distillation columns and a molasses tank, with welded grounding. Passed the 10-ohm limit.
Case study · Lightning Protection
Lightning protection for a power plant
Sugar mill and cogeneration plant
Two protected areas, six ground rods
Negros Occidental, Philippines
Overview
A sugar mill and cogeneration plant in Negros Occidental engaged LMI to protect two high points of the plant from lightning: an area on a conveyor structure and a boiler chimney.
LMI installed air terminals, strike counters and welded grounding in six days, and every ground rod tested well under one ohm.
6ground rods, each welded and tested
0.31–0.73ohms measured across the six rods
6 dayson site, from start to completion
The challenge
- Protect tall plant structures: a conveyor area and a boiler chimney
- Mount air terminals at height on a working plant
- Run copper down conductors safely to the ground
- Make grounding that measures low enough to carry a strike away
The result
- Two air terminals and two strike counters installed
- Six ground rods joined by exothermic welding
- Every rod tested, from 0.31 to 0.73 ohm
- Acceptance test marked Passed
On recordSigned acceptance test, completion report and certificate, March 2026.
How LMI solved it
1Survey
Identified the two high points to protect and planned the grounding.
2Install
Mounted the air terminals and strike counters, and ran copper conductors in conduit.
3Ground
Drove six ground rods in hand-holes and joined them by exothermic welding.
4Test and hand over
Measured each rod's earth resistance, then a signed acceptance test.
Site challenge
- 1Tall structures on a working plant.
- 2Work at height on the conveyor and chimney.
- 3Digging beside plant roads and equipment.
- 4Every rod measured, not a sample.
On site
Mounting at height, a welded ground joint, and an earth-resistance reading of 0.39 ohm.
Verified at handover
- Air terminals mounted at both areas
- Strike event counters installed
- Copper down conductors in conduit
- Six ground rods with welded joints, in covered hand-holes
- Earth resistance measured at every rod
- Readings from 0.31 to 0.73 ohm
On recordAcceptance test signed by the plant's representative. Overall result: Passed.
Same approach, other sites
Accepted November 2025
A sugar mill
Two pole-mounted arresters covering seven plant buildings, measured at 0.18 and 0.26 ohm.
What you get with LMI
Digital transformation requires solid infrastructure.
Every new system depends on the infrastructure beneath it. LMI builds that foundation so your team can find it, maintain it and trust it.
Strikes go to ground, not to your plant
Air terminals and low-resistance grounding give lightning a safe path down.
ProofSix rods, all under one ohm.
Proven by measurement
Every ground rod is tested, and the readings are recorded at handover.
ProofSix readings recorded, 0.31–0.73 ohm.
You can see every strike
Strike counters record each lightning event on the protected structures.
ProofTwo strike counters installed.
Confidence at handover
Your team signs the acceptance test before the system is relied on.
ProofSigned acceptance, March 2026.
Also from LMIThe rest of the infrastructure a digital operation runs on: Network refresh · Fiber optic cabling · Structured copper cabling · Core switching · Managed firewall and Wi-Fi · Managed CCTV · Access control and turnstiles · Electrical works · Turnkey infrastructure projects
Is your plant protected for the next storm? Start with a survey.
Contact us at lori@onelmi.comClient and site names withheld. Product names are trademarks of their owners.
LMI Corporation · Bacolod City, Negros Occidental, Philippines